[EM] Coombs method and typical RCV hybrid, River

[Forest Simmons]

Here's a poor man's version of beatpath:

Anybody qualified to vote is also qualified to nominate a finish order.

Elect the candidate at the head of the strongest finish order among those
nominated.

The strength of a finish order is the strength of its weakest link. The
strength of a link X_k--->X_(k+1) is the number of ballots on which X_k is
ranked ahead of X_(k+1).


El sáb., 22 de ene. de 2022 9:47 p. m., Daniel Carrera <dcarrera at gmail.com>
escribió:

>
>
> On Sat, Jan 22, 2022 at 11:35 PM Forest Simmons <
> forest.simmons21 at gmail.com> wrote:
>
>> Mike Ossipoff once reported explaining Schulze to the complete
>> satisfaction of his non-technical girlfriend, by using an equivalent, but
>> more intuitive, "beatpath" formulation of Schulze:
>>
>> A beatpath is a chain of defeats leading from one candidate to another. A
>> chain is no stronger than its weakest link.
>>
>> We say that X strongly beats Y when  X has a stronger beatpath to Y than
>> Y's strongest beatpath to X.
>>
>> Elect the candidate that strongly beats every other candidate.
>>
>
> [friendly_sarcasm] Yeah, the TV ad just writes itself! [/friendly_sarcasm]
>
> More seriously though, phrasing it like that does help. I still think it's
> quite difficult. I'm not confident that I will remember this explanation in
> 8 months. Also, it is one thing to explain the algorithm and another to
> convince me that the algorithm makes sense. That's another place where I
> think RP has an advantage. If an overwhelming majority is adamant that A >
> B, then you gotta respect that; it's just democracy. Whereas if people
> generally say C > A but they are a little "meh" about it, then maybe that's
> the one to throw away. Also, I didn't have to look up RP to remember that,
> and I'm confident I'll remember it 8 months from now. I think it's just the
> principle of basic fairness, whereas Schulze feels like it's trying to be
> too clever and I don't intuitively trust what would come out of that.
>
> Cheers,
> --
> Dr. Daniel Carrera
> Postdoctoral Research Associate
> Iowa State University
>
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